At present, although FRP membrane housings for reverse osmosis water treatment devices used in China are mainly imported, domestic products have also shown a good momentum of development. The domestic leading level of DTRO Membrane Housings products is close to the international advanced level. . The membrane shell is one of the important components in the reverse osmosis water treatment device. The membrane shell is divided into glass fiber reinforced plastic, stainless steel, and engineering according to the materials used.
FRP has the designability of mechanical properties. FRP materials have excellent corrosion resistance and hygienic properties. At the same time, the product can be designed with strong dimensional accuracy and high surface quality. In fiber-reinforced composite materials, fiber is the main load-bearing element, and the matrix holds the fiber in position. The arrangement is fixed. The load is transferred to each fiber, and the reverse osmosis membrane shell can select fibers and matrix with different performance according to the structural stress conditions and use requirements. As well as their volume percentages, design the fiber laying direction, stacking, and the approximate shape and geometric size of the structure to optimize the structure's performance, weight, and cost.
The 8 INCH FRP RO membrane housings for reverse osmosis water treatment devices bear the cyclic working pressure, and will gradually fatigue under long-term action until the whole is destroyed. The fatigue performance of FRP products is measured by fatigue life, which is the main performance index of FRP products. The number of stress cycles experienced by the FRP membrane shell for reverse osmosis water treatment equipment from the initial load to the critical design pressure under the given cyclic stress and test conditions is called the fatigue life. The fatigue life of the FRP membrane shell should be the same as the design of the reverse osmosis water treatment device The life span is comparable.
DTRO Membrane Housings
The current international application of reverse osmosis membrane housings is mainly FRP, and it is the first choice to use FRP membrane housings in various large and key projects. At the same time, to regulate the production of glass fiber reinforced plastic membrane shells for reverse osmosis water treatment devices, my country has stipulated industry standards, namely JC692-1998 "Glass fiber reinforced plastic pressure shells for reverse osmosis water treatment devices". The standard stipulates the appearance, size requirements, material performance, hydraulic burst pressure, and other contents of the product. These technical indicators are equivalent to the American ASME standard. However, considering the overall domestic technical level, no corresponding regulations were made on the fatigue performance of the product. In the American ASME standard, the fatigue life of the glass fiber reinforced plastic membrane shell for reverse osmosis water treatment equipment is specified as 105 times, and some products claim that the fatigue life can reach 2.5×105 times.
